Telegraphic relay.



PATENTED APR. 25, 1905.

. DUGRETET.

TBLBGRAPHIG RELAY.

APPLIGATIOE FILED APR. 10, 1901.

3 SHEETBSHEET 1.

No.-787,90'5. PATENTED APR. 25, 1905 E DUGRETET.

TBLEGRAPHIG RELAY.

APPLICATION I'ILED APR. 10, 1901.

3 SHEETS-SHEET 2.

No. 787,905. V PATENTED- APR. 25, 1905.

' B. DUGRBTET.

TELEG-RAPHIG RELAYu APPLICATION FILED APR. 10, 1901.

3 SHEETS-SHEET 3.

M52 66566." ,fiwerzzar- 6 52 M76 flmakf.

No. 787,905. Eatented April 25, 1905,

UNITED STATES PATENT OFFICE.

EUGENE DUCRETET, OF PARIS, FRANCE.

TELEGRAPHIC RELAY.

SPECIFICATION forming part of Letters Patent No. 787,905, dated April 25, 1905.

Application filed April 10, 1901. Serial No. 55,207. I

TO 1071/0111, y OOWICWTIA l frame under the influence of the current Be it known that I, EUGENE DUCRETET, a l which circulates in the wire wound on the citizen of the French Republic, residing at movable frame 0.

Paris, France, have invented certain new and R is the flexible contact on which the movuseful Improvements in Telegraphic Relays, able contact Cr), controlled by the spindle of of which the following is a specification. the movable frame, acts. The arched form The principle of frame-relays or relays havof spring R insures a good electrical contact ing a changeable circuit in a magnetic field is between the spring and the contact G0. The known. It is similar to that of the siphonguide which supports this spring permits of IO recorder of Sir WV. Thompson and the mova good and rapid regulation of the relay. able frame-galvanometers known under the The antagonistic spiral spring 0', controlled name of Deprez dArsonval, (shown in by the movable frame, is fastened to a disk (I, Maxwell, 1873,) in which the magnetic field, which revolves on its center and the moveis produced either by means of a permanent ment of which is supplied by aspring 0', Figs.

5 magnet or by means of an electromagnet. l and 3, against the stop of the set-pin B. 5 The suspension of the movable frame is then The stretching-spring 1" draws the stop of obtained either by twist-wires or by a pivoted the disk (Z onto the stop of the regulating-rod spindle actuated by a coiled spring or any B, controlled from outside the relay. This other antagonistic spring. This antagonistic arrangement facilitates the regulation (even 20 motion should be in all cases opposed to the from the outside of the relay-box) of the re- 7 0 electric current which passes through the quired tension of the antagonistic spiral movable circuit and which produces its disspring 9'. A guard or cover may be provided placement in the magnetic field. for the pin B to be used when the regulation This present invention relates to improve is finished.

5 ments in the details of magnetic relays as Asingle mass or several massesmmare proheretofore constructed, the object being to vided to balance the movable frame (J, Figs. obtain increased sensitiveness and to greatly 3 and 4. facilitate the regulation of the principal parts The whole apparatus is mounted on a bridge of the relay, as shown in the accompanying P, which comprises the two set-screws o p,

- 5 drawings. regulating the motions of the movable frame Figure 1 is an elevation of my improved C. This manner of mounting allows the regudevice. Fig. 2 is a plan view. Figs. 3, L, lation of the whole device with or without the and 5 are detail views. Fig. 6 is a section on magnet. The apparatus and the magnet are the line 6 6 of Fig. 2 looking in the direction thus independent of each other. 35 of the arrows. Fig.- 7 is a perspective view S is the base or stand on which the apparatus 5 of the device. rests. This base may be of any form that will The permanent magnet Ad is formed of a provide against vibration. steel blade placed as shown in Figs. 1 and 2, A flexible contact is obtained by means of a forming at its polar ends a homogeneous spring R, Fig. 5. The contact is formed at 4 magnetic field in which is placed the movable ()0. This portion is very accessible and is 9 frame C. This movable frame 0 is provided movable on a small slide, which facilitates the with a fixed interior piece of iron AM. It is regulation of the electric contacts of the relay. the ballistic effect or projective force of this The latter is fastened to the movable frame movable frame which produces the contacts and contacts with R at ()0.

45 of the relay at R. The movements of the The processes intended to prevent the 00- movable frame are very slight in this magcurrence of sparks at the breaking of contacts netic field. The piece Am is placed inside of the relay are already known, so that it is the movable frame C. This fixed frame conl unnecessary to describe them. centrates the lines of force of the poles of Fig. 7 shows plainly the bridge P, carrying 5 the magnet Ari, between which moves the the set-screws no for regulating the motions I00 of the movable frame C, and to which bridge is secured a rod 0, upon which is fixedly secured the frame Am.

The casing which covers the relay is furnished with a small window, which allows the motions of the movable frame and of the contacts to be observed. This casing can be quickly taken ofi. Under the socket feet itted with springs or india-rubber P2 lessen the effect of the shocks.

Any suitable metal--sucl1 as gold, silver, platinum, or the likemay be used for making the contacts.

The ends of the fine conducting-wire, which is wound on the movable frame U by means of small flexible coils and of insulated stops, extend to the outside binding-screws and Fig. 2.

p p designate screws serving as bearings for the pin of the movable frame C.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a sensitive telegraphic relay a rigid metallic plate, the rotatable disk (Z, a movable frame, a spring arranged to act upon the said disk, an antagonistic spring, and a regulatingscrew controlling the antagonistic spring by means of said disk to give the required sensitiveness to said frame.

2. In a sensitive telegraphic relay the combination of a rigid metallic plate, a rotatable disk, a spring cooperating therewith, a movable frame, a regulating-screw for controlling said spring through the medium of said disk to give the required sensitiveness to said frame, a magnet of a form to place said frame in a homogeneous and powerful mz'tgnetic field.

3. In a magnetic or telegraphic relay, the combination of a movable frame, the spindle thereof, the antagonistic spring controlling said spindle, a rotatable disk controlling said spring and a regulating-screw whereby the sensitiveness may be adjusted as required.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

Witnesses:

EDWARD P. MAeLmAN, GEORGE E. Lioirr. 

